JPS6288791A - Controller for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an elevator control system in which multiplex transmission is performed between a computer in a car room and a main computer in a machine room.

[Technical background of the invention and its problems]

Hundreds of electric wires are installed between the elevator machine room and the cars to communicate information, and these electric wires serve as moving cables that move according to the running of the car. If the number of electric wires increases, the weight of the entire moving cable increases, which increases the burden on the hoisting machine and increases power consumption. Furthermore, since the movable cable moves in accordance with the progress of the car, if the number of main lines of the cable increases, the cables may become entangled with each other, which is dangerous. Therefore, conventionally,
In order to reduce the number of these moving cables (:, and to improve the processing power of the computer system in the entire elevator, a computer is also installed in the car room, and the main computer in the machine room and multiplex transmission 1 = more signal The computer sends and receives information to control the entire car room.However, if these computers fail, information will not be communicated properly and the elevator will not be able to operate normally.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator control device that allows the elevator to operate even if a computer installed in a car malfunctions.

[Summary of the invention]

In the present invention, the gl calculation means provided in the car compartment outputs a program abnormality detection signal, and the program abnormality detection means outputs a program abnormality detection signal when the program abnormality detection signal is not input periodically. It detects that the Niprogram has become abnormal, gives a start/stop command to the first calculation means to stop it, and simultaneously outputs a NiPro program abnormality detection signal to the second calculation means installed in the two machine rooms. death,
In response to this program detection signal, the second calculation means outputs a restart order to the first calculation means via the program abnormality detection means, and the elevator control device and the second calculation means, which enable restart, detect the program abnormality. To provide an elevator control device that generates a simulated call at the terminal floor by inputting a detection signal, outputs a stop operation command for each floor, and enables stop operation for each floor.

[Embodiments of the invention]

An embodiment based on the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an elevator control device. People are in the elevator car, and B is in the machine room.

1 is a processor of a computer. processor 1
Performs car call registration and door opening/closing control in the car room. Processor l outputs DO and C8 as signals for detecting program abnormality.

DO is a signal on the data bus of processor 1, and C8 is a signal that is output when an address is specified by a program in processor 1.The program abnormality detection circuit includes an AND circuit 2, a divider 3, and a flip-flop. circuit 4
, an oscillation circuit 6 and an inverter 10. Signals DO and C8 are input to AND circuit 21. The output of the AND circuit 2 is input to an output buffer 5 via a branching unit 3 and a flip-flop circuit 4. The output of the flip-flop circuit 4 is sent to the processor +2 as a processor startup/stop command HOLD. Frequency divider 3 (: is connected to oscillation circuit 6.

7 is an elevator control device noflow processor provided in the mechanical type B. The processor 7 controls the speed of the elevator;
Performs implantation control, etc. The processor 7 outputs a restart signal FL8T, which is input to the input buffer 9 of the car via the output buffer 8.

The output of the input buffer 9 is passed through the inverter 10 to the clear terminal C of the frequency divider 3 and the reset terminal R of the flip-flop circuit 4.
; Two people are strong. The output of the output buffer 5 is input to the processor 7 (= input) via the input buffer 11 in the machine room B. In the figure, (→(→ is a DC power supply. Input buffer 9,
11 and output buffer 5.8 are photocouplers.

Above configuration 1: Based on the operation of the embodiment (two explanations will be given).

The waveforms of each part of the processor 1 and the program abnormality detection circuit provided in the car room are shown in FIG.

The processor 1 outputs a specific address, and the signal C8 obtained by decoding this address becomes the ILE level (IJ@)l+e level. Since the data bus (2u1''') is sent out (:), the output M number DO7 from the processor 1 becomes the i''L' level to the IJ u HII level.

By inputting the signal C8 and the signal DO, the output 1a of the AND circuit 2 changes from the "L" level to aH level (:), and the count value of the frequency divider 3 is cleared and starts counting again. The divider 3 counts the output 2a of the oscillator 6, and if it counts up edges 10 times, it outputs an output 3a as shown in (B) in Figure 2.Normally, the divider 3 counts up edges 10 times. Before (:, the signals cs and Do are output from the processor 1 and clear the count value of the frequency divider 3. Therefore, if the signals CS and Do are regularly output from the processor 1, the division is normal. The output 3a of the frequency generator 3 continues to output "L" level.The output 4a of the flip-flop 4 is wH
Promote W level.

However, if there is an abnormality in the execution of the program due to noise or other causes, the signals DO and C8 cannot be output normally from the (equal) processor 1 in Figure 2. In this case,
Output 1a of AND circuit 2 which is the clear signal of branch unit 3
is not output even after a predetermined period of time has elapsed. If the clear signal is not input to the clear terminal C of the divider 3 for a predetermined period of time or longer, the divider 3 will change the output 3 a from the 1L level to the @H'' level when counting the 10th up edge of the signal 2a. .The output 4a of the flip-flop 4 goes from the 1H" level to the @L" level. This controls the starting and stopping of the processor 1. 1 is stopped, and a program abnormality detection signal WDT is outputted via the output buffer 5.

Next (=, Machine room B (==The processor 7 of the elevator control device installed
The process when the DT signal is input will be explained using the restart process flowchart shown in Figure 3 and 0 in Figure 2. ``The WD'l' signal of the lL level is Fuse') +
7, it is called from the main flow of the program being executed in the processor 7 and restart processing is performed. Step (1) At t:, it is determined whether the restart signal 1'L8T is being outputted, and if it is not being outputted, the process moves to step (2) +:.

If the R8T8T output count value is 4 or less, set the maintenance data λ (step (3)) 7 RsT
Output the signal (step (4))', then R
The number of f9T outputs is counted up (step (5)), and the process returns to the main flow. Maintenance data can be set up by a person in the machine room (; equipped with a processor 7
I = Therefore, it is to record that the processor 1 in the car room has been restarted, and can be confirmed at the time of maintenance.

In step (4), when the RAT signal is output,
The R8T signal is set to ``HH level'' by the output buffer 8.
'Level. Change in the BT signal I: The output 6a of the provided input buffer 9 changes to 1L" level L from the @H level. This signal is inverted by the inverter 10, and the output 6a of the provided input buffer 9 changes. The flip-flop 4 is reset. When the flip-flop 4 is reset, the output 4a changes from the @L" level to the "H" level, so the output 4a restarts the processor 1. Also, wDT
The signal also returns from the -L level to the @H" level. This VDT signal returns to the @H' level. Therefore, the processor 7 returns the R8T signal from the @L" level to the @H" level. R8T If the output repeats three times,
After performing step (2), steps (6), (7), and (8) are performed.

Maintenance data B indicating a failure state is set from the abnormality indicator of the processor 1 in the car room, and then a failure display command is output and a start/stop command flag is set. After that, it returns to the main flow, and the start/stop command flag I
: Stops the elevator from starting further.

Above (2) When the program execution of the computer installed in the car room is abnormal, machine room I: installed processor: 6: restart can be performed automatically, I can confirm.

Next, other processing of the six processors 7 will be described.

The program abnormality detection signal VDT was sent from the car manager to machine room B.
When the processor 76 is operated by two people via the input buffer 11, the processing in the processor 7I- will be explained with reference to FIGS. 4 and 5. FIG. 4 shows the entire flowchart of the VDT detection process, and FIG. 5 shows the flowchart of the hall call stopping process for each floor. When the program abnormality detection signal WDT is input, the subroutine WDT processing flow is called from the main flow of the processor 7. Step (1) 4
2, a failure display command is output to each floor landing and car home. Step (2) +: outputs a stop operation command for each floor based on a hall call (-), and returns to main flow 1; thereafter, the main 70- calls a stop processing flow for each floor based on a hall call. Step (3) 42 VDT
During normal operation processing before the signal is input, the hall call (: If the answered one is for upward operation, execute step (4); if it is for downward operation, execute step (5) Step (4) creates two simulated calls for the top floor. Step (5) creates a simulated call for the bottom floor. Then, in step (6) E, outputs a stop operation command for each floor. When the platform call button for ascending operation is pressed on the floor, the ride to the top floor (simulated call is set, and each floor operation command 4 = is used to stop at each floor). You can get off at the destination floor (2), and the same goes for descending. Car room I:
Program execution error 1 of the installed computer system
2. Normal - Passengers can be transported to destination floor I even if car call registration is not performed.

[Effects of the Invention] The present invention detects a program abnormality in the car width 9 computer and causes the processor of the elevator control device provided in the machine room 62 to restart the car processor or stop each floor. 1 is a circuit diagram of an elevator control device based on the present invention (-), FIG. 2 is a waveform diagram of each part of the circuit diagram shown in FIG. FIG. 4 is a flowchart for issuing a stop operation command for each floor executed by the processor of the elevator control device shown in FIG. 1, and FIG. 5 is a flowchart for processing for stopping each floor for hall calls.

Claims (2)

[Claims] (1) A first calculation means provided in the car and outputting a program abnormality detection signal; and a first calculation means that outputs a program abnormality detection signal when the program abnormality detection signal outputted by the first calculation means does not change for a predetermined period of time or more. a program abnormality detection means for outputting a start stop command and a program abnormality detection signal to the means; and a second calculation means for outputting a restart command to the first calculation means in response to a program abnormality detection signal from the program abnormality detection means. An elevator control device comprising: (2) a first calculation means provided in the car and outputting a signal for detecting a program abnormality; a program abnormality detection means for outputting a start/stop command and a program abnormality detection signal to the means; and a program abnormality detection means provided in the machine room, when a program abnormality detection signal from the program abnormality detection means is input, a simulated call is generated to the terminal floor and each floor is stopped. A control device for an elevator, comprising a second calculation means for outputting an operation command.